@organizedchaos04 , hi, my family doesn't have a "known" marker but may have a yet to be identified one. Aneurysms are vascular diseases and not heart diseases, diet and exercise help prevent other vascular diseases and of course heart diseases, but not necessarily aneurysms. I have been very active all my life, fairly intense work outs, never smoked, eat well, never overweight, marginal high BP developed later in life controlled with medication and exercise, and still developed aneurysms. And in this forum there are threads related to high endurance athletes that also developed aneurysms. So besides genetics, bicuspid aortic valves are also known to make people more vulnerable to aneurysms (my valve is bicuspid so double whammy), life long high BP struggles, there is just not a lot more known as to why they appear. We just have to be glad we found them before they became an emergency.

In my case, my cardiologist, who is a recognized aortic disease expert, sees me every year to monitor my aortic valve and the aneurysm repair and of course my BP, and every 4 years orders full aortic MRAs (3 hours in the machine), groin, abdomen and chest, and he adds neck and head (unless my neurosurgeon has done one recently) to make sure no new aneurysms are appearing on major arteries. That is why I think it is so important to be seen by someone who really understands aneurysms.

In the mean time, the best we can do is to continue staying active, treat our body well, control our BP, and get monitored.

All the best